單擊應用程序圖標打開導航抽屜

Question

我想通過單擊應用程序圖標讓我的用戶打開導航欄。 這是我的代碼：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add);
    // Show the Up button in the action bar.

    DrawerLayout mDrawerLayout = (DrawerLayout) findViewById(R.id.left_drawer);
    ActionBarDrawerToggle mDrawerToggle = new ActionBarDrawerToggle(
            this,                  /* host Activity */
            mDrawerLayout, /* DrawerLayout object */
           R.drawable.ic_drawer,  /* nav drawer icon to replace 'Up' caret */
            R.string.drawer_open,  /* "open drawer" description */
            R.string.drawer_close  /* "close drawer" description */
            ) {

        /** Called when a drawer has settled in a completely closed state. */
        public void onDrawerClosed(View view) {
            getActionBar().setTitle(R.string.title_activity_add);
        }

        /** Called when a drawer has settled in a completely open state. */
        public void onDrawerOpened(View drawerView) {
            getActionBar().setTitle(R.string.drawer_title);
        }
    };


    mDrawerLayout.setDrawerListener(mDrawerToggle);
    getActionBar().setDisplayHomeAsUpEnabled(true); // Pressing the app icon in the action bar will navigate to the parent activity.
    getActionBar().setHomeButtonEnabled(true);

}

但是當我點擊圖標時，沒有任何反應。 問題出在哪兒。

Answer 1

看看這里的文檔示例 。 你需要額外的代碼

• onPostCreate()用於同步您的Drawer狀態
• onOptionsItemSelected()用於處理App圖標的觸摸事件

• onConfigurationChanged()為抽屜提供新配置

   public class YourActivity extends Activity { public ActionBarDrawerToggle mDrawerToggle; @Override protected void onCreate(Bundle savedInstanceState) { ... mDrawerToggle = new ActionBarDrawerToggle(); ... } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mDrawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onOptionsItemSelected(MenuItem item) { // Pass the event to ActionBarDrawerToggle, if it returns // true, then it has handled the app icon touch event if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle your other action bar items... return super.onOptionsItemSelected(item); } } 

Answer 2

您應該覆蓋活動的onOptionsItemSelected並使用：

@Override
    public boolean onOptionsItemSelected(MenuItem item) {

        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
}